Vigilance in Greater Flamingos Wintering in Southern Tunisia: Age‐Dependent Flock Size Effect
Identifieur interne : 000720 ( Main/Exploration ); précédent : 000719; suivant : 000721Vigilance in Greater Flamingos Wintering in Southern Tunisia: Age‐Dependent Flock Size Effect
Auteurs : Jihen Boukhriss [Tunisie] ; Slaheddine Selmi [Tunisie] ; Arnaud Béchet [France] ; Saïd Nouira [Tunisie]Source :
- Ethology [ 0179-1613 ] ; 2007-04.
Abstract
Decrease in individual vigilance with flock size is a widely recognized pattern in group‐living species. However such a relationship may be affected by other factors, such as age and flock composition. For instance, because young animals generally lack experience and have higher nutritional needs than adults, they can be expected not only to be less vigilant than adults but also to decrease their vigilance level by a greater extent when flock size increases than adults do. We investigated this issue using data on greater flamingos wintering in the gulf of Gabès, in southern Tunisia. Flamingos tended to congregate in small single‐age flocks for feeding, but as flock size increased, flocks became mixed. We found that when flock size increased, young flamingos significantly decreased their vigilance time, while adult did not, suggesting an age‐dependent flock size effect on vigilance. However, when flock composition (single‐age vs. mixed) was taken into account, a more complex pattern was found. Within single‐age and small flocks, no difference was found between young flamingos and adult ones regarding their vigilance level and their response to increasing flock size. However, within mixed and large flocks, adult flamingos were more vigilant than young ones, while variation in flock size did not result in a significant change in vigilance. These results suggest that young birds relied on the presence of adults, and hence more experienced individuals in detecting dangers, to reduce their vigilance and to increase their foraging time in order to satisfy their higher nutritional requirements. They could also be interpreted as a possible consequence of increasing competition with flock size which constrained more nutritionally stressed young flamingos to increase their foraging time to the detriment of vigilance.
Url:
DOI: 10.1111/j.1439-0310.2007.01335.x
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 001312
- to stream Istex, to step Curation: 001311
- to stream Istex, to step Checkpoint: 000407
- to stream Main, to step Merge: 000735
- to stream Main, to step Curation: 000720
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Vigilance in Greater Flamingos Wintering in Southern Tunisia: Age‐Dependent Flock Size Effect</title><author><name sortKey="Boukhriss, Jihen" sort="Boukhriss, Jihen" uniqKey="Boukhriss J" first="Jihen" last="Boukhriss">Jihen Boukhriss</name></author><author><name sortKey="Selmi, Slaheddine" sort="Selmi, Slaheddine" uniqKey="Selmi S" first="Slaheddine" last="Selmi">Slaheddine Selmi</name></author><author><name sortKey="Bechet, Arnaud" sort="Bechet, Arnaud" uniqKey="Bechet A" first="Arnaud" last="Béchet">Arnaud Béchet</name></author><author><name sortKey="Nouira, Said" sort="Nouira, Said" uniqKey="Nouira S" first="Saïd" last="Nouira">Saïd Nouira</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:C9CA2A0BB7B17D7A28D5CA6155ED54E6A97577F5</idno><date when="2007" year="2007">2007</date><idno type="doi">10.1111/j.1439-0310.2007.01335.x</idno><idno type="url">https://api.istex.fr/document/C9CA2A0BB7B17D7A28D5CA6155ED54E6A97577F5/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001312</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001312</idno><idno type="wicri:Area/Istex/Curation">001311</idno><idno type="wicri:Area/Istex/Checkpoint">000407</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000407</idno><idno type="wicri:doubleKey">0179-1613:2007:Boukhriss J:vigilance:in:greater</idno><idno type="wicri:Area/Main/Merge">000735</idno><idno type="wicri:Area/Main/Curation">000720</idno><idno type="wicri:Area/Main/Exploration">000720</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Vigilance in Greater Flamingos Wintering in Southern Tunisia: Age‐Dependent Flock Size Effect</title><author><name sortKey="Boukhriss, Jihen" sort="Boukhriss, Jihen" uniqKey="Boukhriss J" first="Jihen" last="Boukhriss">Jihen Boukhriss</name><affiliation wicri:level="1"><country xml:lang="fr">Tunisie</country><wicri:regionArea>Département des SVT, Faculté des Sciences de Gabès, Zrig, Gabès</wicri:regionArea><wicri:noRegion>Gabès</wicri:noRegion></affiliation></author><author><name sortKey="Selmi, Slaheddine" sort="Selmi, Slaheddine" uniqKey="Selmi S" first="Slaheddine" last="Selmi">Slaheddine Selmi</name><affiliation wicri:level="1"><country xml:lang="fr">Tunisie</country><wicri:regionArea>Département des SVT, Faculté des Sciences de Gabès, Zrig, Gabès</wicri:regionArea><wicri:noRegion>Gabès</wicri:noRegion></affiliation></author><author><name sortKey="Bechet, Arnaud" sort="Bechet, Arnaud" uniqKey="Bechet A" first="Arnaud" last="Béchet">Arnaud Béchet</name><affiliation wicri:level="3"><country xml:lang="fr">France</country><wicri:regionArea>Station Biologique de la Tour du Valat, Arles</wicri:regionArea><placeName><region type="region">Provence-Alpes-Côte d'Azur</region><region type="old region">Provence-Alpes-Côte d'Azur</region><settlement type="city">Arles</settlement></placeName></affiliation></author><author><name sortKey="Nouira, Said" sort="Nouira, Said" uniqKey="Nouira S" first="Saïd" last="Nouira">Saïd Nouira</name><affiliation wicri:level="3"><country xml:lang="fr">Tunisie</country><wicri:regionArea>Département de Biologie, Faculté des Sciences de Tunis, Campus Universitaire, Tunis</wicri:regionArea><placeName><settlement type="city">Tunis</settlement><region nuts="2">Gouvernorat de Tunis</region></placeName></affiliation></author></analytic><monogr></monogr><series><title level="j">Ethology</title><idno type="ISSN">0179-1613</idno><idno type="eISSN">1439-0310</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2007-04">2007-04</date><biblScope unit="volume">113</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="377">377</biblScope><biblScope unit="page" to="385">385</biblScope></imprint><idno type="ISSN">0179-1613</idno></series><idno type="istex">C9CA2A0BB7B17D7A28D5CA6155ED54E6A97577F5</idno><idno type="DOI">10.1111/j.1439-0310.2007.01335.x</idno><idno type="ArticleID">ETH1335</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0179-1613</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Decrease in individual vigilance with flock size is a widely recognized pattern in group‐living species. However such a relationship may be affected by other factors, such as age and flock composition. For instance, because young animals generally lack experience and have higher nutritional needs than adults, they can be expected not only to be less vigilant than adults but also to decrease their vigilance level by a greater extent when flock size increases than adults do. We investigated this issue using data on greater flamingos wintering in the gulf of Gabès, in southern Tunisia. Flamingos tended to congregate in small single‐age flocks for feeding, but as flock size increased, flocks became mixed. We found that when flock size increased, young flamingos significantly decreased their vigilance time, while adult did not, suggesting an age‐dependent flock size effect on vigilance. However, when flock composition (single‐age vs. mixed) was taken into account, a more complex pattern was found. Within single‐age and small flocks, no difference was found between young flamingos and adult ones regarding their vigilance level and their response to increasing flock size. However, within mixed and large flocks, adult flamingos were more vigilant than young ones, while variation in flock size did not result in a significant change in vigilance. These results suggest that young birds relied on the presence of adults, and hence more experienced individuals in detecting dangers, to reduce their vigilance and to increase their foraging time in order to satisfy their higher nutritional requirements. They could also be interpreted as a possible consequence of increasing competition with flock size which constrained more nutritionally stressed young flamingos to increase their foraging time to the detriment of vigilance.</div></front></TEI><affiliations><list><country><li>France</li><li>Tunisie</li></country><region><li>Gouvernorat de Tunis</li><li>Provence-Alpes-Côte d'Azur</li></region><settlement><li>Arles</li><li>Tunis</li></settlement></list><tree><country name="Tunisie"><noRegion><name sortKey="Boukhriss, Jihen" sort="Boukhriss, Jihen" uniqKey="Boukhriss J" first="Jihen" last="Boukhriss">Jihen Boukhriss</name></noRegion><name sortKey="Nouira, Said" sort="Nouira, Said" uniqKey="Nouira S" first="Saïd" last="Nouira">Saïd Nouira</name><name sortKey="Selmi, Slaheddine" sort="Selmi, Slaheddine" uniqKey="Selmi S" first="Slaheddine" last="Selmi">Slaheddine Selmi</name></country><country name="France"><region name="Provence-Alpes-Côte d'Azur"><name sortKey="Bechet, Arnaud" sort="Bechet, Arnaud" uniqKey="Bechet A" first="Arnaud" last="Béchet">Arnaud Béchet</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Bois/explor/RenardV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000720 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000720 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Bois
|area= RenardV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:C9CA2A0BB7B17D7A28D5CA6155ED54E6A97577F5
|texte= Vigilance in Greater Flamingos Wintering in Southern Tunisia: Age‐Dependent Flock Size Effect
}}
| This area was generated with Dilib version V0.6.27. |  |